/*
* Rewrite an iget/iput instruction if appropriate. These all have the form:
* op vA, vB, field@CCCC
*
* Where vA holds the value, vB holds the object reference, and CCCC is
* the field reference constant pool offset. For a non-volatile field,
* we want to replace the opcode with "quickOpc" and replace CCCC with
* the byte offset from the start of the object. For a volatile field,
* we just want to replace the opcode with "volatileOpc".
*
* If "volatileOpc" is OP_NOP we don't check to see if it's a volatile
* field. If "quickOpc" is OP_NOP, and this is a non-volatile field,
* we don't do anything.
*
* "method" is the referring method.
*/
static void rewriteInstField(Method* method, u2* insns, Opcode quickOpc,
Opcode volatileOpc)
{
ClassObject* clazz = method->clazz;
u2 fieldIdx = insns[1];
InstField* instField;
instField = dvmOptResolveInstField(clazz, fieldIdx, NULL);
if (instField == NULL) {
ALOGI("DexOpt: unable to optimize instance field ref "
"0x%04x at 0x%02x in %s.%s",
fieldIdx, (int) (insns - method->insns), clazz->descriptor,
method->name);
return;
}
if (volatileOpc != OP_NOP && dvmIsVolatileField(instField)) {
updateOpcode(method, insns, volatileOpc);
ALOGV("DexOpt: rewrote ifield access %s.%s --> volatile",
instField->clazz->descriptor, instField->name);
} else if (quickOpc != OP_NOP && instField->byteOffset < 65536) {
updateOpcode(method, insns, quickOpc);
dvmUpdateCodeUnit(method, insns+1, (u2) instField->byteOffset);
ALOGV("DexOpt: rewrote ifield access %s.%s --> %d",
instField->clazz->descriptor, instField->name,
instField->byteOffset);
} else {
ALOGV("DexOpt: no rewrite of ifield access %s.%s",
instField->clazz->descriptor, instField->name);
}
return;
}
/*
* Rewrite a static field access instruction if appropriate. If
* the target field is volatile, we replace the opcode with "volatileOpc".
*
* "method" is the referring method.
*/
static void rewriteStaticField0(Method* method, u2* insns, Opcode volatileOpc,
u4 fieldIdx)
{
ClassObject* clazz = method->clazz;
StaticField* staticField;
assert(volatileOpc != OP_NOP);
staticField = dvmOptResolveStaticField(clazz, fieldIdx, NULL);
if (staticField == NULL) {
ALOGI("DexOpt: unable to optimize static field ref "
"0x%04x at 0x%02x in %s.%s",
fieldIdx, (int) (insns - method->insns), clazz->descriptor,
method->name);
return;
}
if (dvmIsVolatileField(staticField)) {
updateOpcode(method, insns, volatileOpc);
ALOGV("DexOpt: rewrote sfield access %s.%s --> volatile",
staticField->clazz->descriptor, staticField->name);
}
}
void VM::runCycle ()
{
updateOpcode ();
switch (opcode)
{
case 0x01:
transfer (A, B);
break;
case 0x02:
transfer (B, A);
break;
case 0x03:
transfer (A, C);
break;
case 0x04:
transfer (C, A);
break;
case 0x05:
transfer (B, C);
break;
case 0x06:
transfer (C, B);
break;
case 0x07:
A.data++;
break;
case 0x08:
A.data--;
break;
case 0x09:
B.data++;
break;
case 0x0A:
B.data--;
break;
case 0x0B:
C.data++;
break;
case 0x0C:
C.data--;
break;
case 0x0D:
A.data = A.data + B.data;
break;
case 0x0E:
B.data = A.data + B.data;
break;
case 0x0F:
A.data = A.data + C.data;
break;
case 0x10:
C.data = A.data + C.data;
break;
case 0x11:
B.data = B.data + B.data;
break;
case 0x12:
C.data = B.data + C.data;
break;
case 0x13:
A.data = A.data - B.data;
break;
case 0x14:
A.data = A.data - C.data;
break;
case 0x15:
B.data = B.data - A.data;
break;
case 0x16:
B.data = B.data - C.data;
break;
case 0x17:
C.data = C.data - A.data;
break;
case 0x18:
C.data = C.data - B.data;
break;
case 0x19:
A.data = A.data * B.data;
break;
case 0x1A:
B.data = A.data * B.data;
break;
case 0x1B:
A.data = A.data * C.data;
break;
case 0x1C:
C.data = A.data * C.data;
break;
case 0x1D:
B.data = B.data * C.data;
break;
case 0x1E:
C.data = B.data * C.data;
break;
case 0x1F:
A.data = A.data / B.data;
break;
case 0x20:
A.data = A.data / C.data;
break;
case 0x21:
B.data = B.data / A.data;
break;
case 0x22:
B.data = B.data / C.data;
break;
case 0x23:
C.data = C.data / A.data;
break;
case 0x24:
C.data = C.data / B.data;
break;
case 0x25:
updateOpcode ();
A.data += opcode;
break;
case 0x26:
updateOpcode ();
A.data -= opcode;
break;
case 0x27:
updateOpcode ();
A.data *= opcode;
break;
case 0x28:
updateOpcode ();
A.data /= opcode;
break;
case 0x29:
updateOpcode ();
B.data += opcode;
break;
case 0x2A:
updateOpcode ();
B.data -= opcode;
break;
case 0x2B:
updateOpcode ();
B.data *= opcode;
break;
case 0x2C:
updateOpcode ();
B.data /= opcode;
break;
case 0x2D:
updateOpcode ();
C.data += opcode;
break;
case 0x2E:
updateOpcode ();
C.data -= opcode;
break;
case 0x2F:
updateOpcode ();
C.data *= opcode;
break;
case 0x30:
updateOpcode ();
C.data /= opcode;
break;
case 0x31:
updateOpcode ();
setMemory (opcode, A);
break;
case 0x32:
updateOpcode ();
setMemory (opcode, B);
break;
case 0x33:
updateOpcode ();
setMemory (opcode, C);
break;
case 0x34:
updateOpcode ();
loadMemory (opcode, A);
break;
case 0x35:
updateOpcode ();
loadMemory (opcode, B);
break;
case 0x36:
updateOpcode ();
loadMemory (opcode, C);
break;
case 0x37:
updateOpcode ();
proc.clearAll ();
proc.data = A.data - opcode;
break;
case 0x38:
if (proc.data == 0)
{
}
break;
default:
break;
}
}